Malicious PDF — malware analysis report

Static analysis result for SHA-256 c96a768cdbfb69b8…

MALICIOUS

PDF

73.1 KB Created: 2020-08-06 17:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 83d0d3e85cfefc0e4740bcbb57be7550 SHA-1: f05a4d701d1a13f72975a76b220b7e6ee4ebea6a SHA-256: c96a768cdbfb69b8d280e37aa235fee80020804801f2b7e19e35be7113f8f13b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link and a link farm. The embedded URL points to a redirector that uses a keyword related to training programs. The document body, though heavily obfuscated, contains the same keyword and a URL that appears to be the initial lure. The primary IOC is the malicious redirector URL.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=ectomorph+training+program+pdf
    • http://files.searchlightorganization.com/uploads/1/3/0/8/130814397/fopir.pdf
    • http://files.joshuahookart.com/uploads/1/3/0/7/130776208/rametijomav.pdf
    • http://files.ryanswanson21.com/uploads/1/3/1/8/131857916/sajadirepaf.pdf
    • http://files.abundantyoga.com.au/uploads/1/3/1/0/131069987/gupowozegevagef.pdf
    • https://cdn.shopify.com/s/files/1/0445/3587/3700/files/relev_d_emploi_en_ligne.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/adobe_creator_pro_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5930/files/investments_10th_edition_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/1979/6633/files/42639937850.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/bufimabaxumaberi.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/85334968681.pdf
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/84371981926.pdf
    • https://cdn.shopify.com/s/files/1/0430/8677/4436/files/24824069723.pdf
    • https://cdn.shopify.com/s/files/1/0428/3501/7895/files/46482074716.pdf
    • https://cdn.shopify.com/s/files/1/0437/1880/3605/files/bereroziwazojonifugar.pdf
    • https://cdn.shopify.com/s/files/1/0431/0722/1658/files/58240260432.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d685.bin
f3f8f3dd2d2b7eb965693c2d5a433ba1e0cdcbaa1d2d03d159323ee5048dfa33		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD685 4988 bytes
font_01_sfnt_off0000e741.bin
d7b66aa48c6b865b16549880cf9c6fb647e40a5fdd2f8b723b441e8424b9d231		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 9928 bytes
font_02_sfnt_off0001093d.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1093D 4324 bytes

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